Brake shoe and head



C. I. WALKER.

BRAKE SHOE AND HEAD.

APPLICATIONJILED JUNE 1, 1920.

Patented Sept 13, 1921.

WITNESS INVEN'IORv W166 IWalker hi4 ATTORNEYS UNITED STATES cnannns I.WALKER, or slut rnaivcisco, CALIFORNIA.

BRAKE sHoE Ann HEAD.

Specification of Letters Patent. Patented Sept. 13,1921,

Apfllitiation filed 'Iune 1, 1920. Serial No. 385,521.

To allr'whomit may concern:

Be it knownthat LCHARLES I. WALKER, a citizen of the United States,-anda resident of the cit and county of San Francisco, State of California,have invented a certain new and useful Brake Shoe and Head, of which thefollowing is a specification.

This invention relates to railway car brakes and more particularly to acombined shoe and head.

Certain types of brake shoes have their backs rabbeted and formed withupper transverse shoulders against which, bear an applied head. Whenfirst applied to the shoe, the head seats firmly on the shoulders andthe shoe has but little lateral play but, as the shoulders wear, theplay increases to a considerable and undesirable amount.

It is an object of the resent invention to eliminate this undesirab eplay as the parts wear. Another object is to provide a reliable,effective and substantial means for interlocking the shoe and the headagainst undue lay. A further object is to provide an interlocking meansof extremely simple, and readily applied and removed, parts eachcomparatively light and small. a

The invention possesses other objects and features of advantage, some ofwhich, with the foregoing, will be made manifest in the followingdescription of the preferred form of the invention which is illustratedin the drawings accompanying and forming part of the specification. Itis to be understood that it is not intended to limit the invention tothe embodiment shown by the said drawings and description as variationsmay be adopted Within the scope of the invention as set forth in theclaims.

Referring to the drawings:

Figure 1 is a side elevation of the assembled device.

Fig. 2 is a cross-section on line 2--2 of Fi 1.

ig. 3 is a section on line 3-3, of Fig. 1.

Fig. 4 is a perspective of the shoe.

The improved structure includes a brake shoe having, seated on its back,a substantial head which is removably inned thereto; the pin beinginterlocked wit a retainer or clip operative to restrain the shoe fromhaving undue oscillating lay toward and from the flange of a whee onwhich the brake ma be mounted. A

n the preferred form of the invention a brake shoe 2 is provided with amedial, rear lug 3 having an eye or aperturea longitudinally concentricwith the curvature of the shoe body. Theback of the shoe is rabbeted orotherwise shaped to provide transverse shoulders 5-5 nearthe ends andagainst these abut the contiguous cndsof a substantial parttermed thehead 6,v which is attachable to the brake operating mechanism by anysuitable means.

The face of the head that is applied to the shoe has a medial pocket 7to take the lug 3 and is also provided with cavities 8-8 from whichextend the ends 9-9 engaging the shoulders 5-5.

Between the pocket 7 and the cavities are bearing lugs 10-10 on the head6, and these lugs and the ends 9-9 are perforated in a line, as at11--12-13 and ltand in register With the eye 4 0f the lug 3. The eye iselongated transversely of the lug and through it and the holes 11-12-13and 14 is passed a key or in 15 that is preferably tapered. Preferablythe pin 15 has a loose fit in the eye 4 of the lug 3.

Such means here is in the form of a simple hooklike clip of substantialstructure and material, as a casting or forging. The pin is ofrectangular form in cross section and the clip has a body 16 of L-shapeform edgewise, one arm 17 of which has a returned hook 18 spaced fromthe arm so as to be passed across, or receive, the pin 15, the arm 19 ofthe body bearing on the outer edgeof the shoe, i. 6., the edge remotefrom the flange of a wheel W, shown in dotted line in Fig. 2. The clipis disposed in the upper cavity 8 of the head and when in place againstthe in 15 holds the shoe against unwonted si e play. The clip may bereadily formed of flat stock forged to the desired longitudinal shape,is readily applied and is retained by the pin against loss from the oranized structure.

he hook 18 may be struck down over the side of the pin to bind it.

I claim:

1. A combined wheelbrake shoe and shoehead, means for pivotallyinterlocking the shoe and head and an attachment for limiting lateralrelative movement of the shoe.

2. A combined wheel-brake shoe and shoe head mutually interlocked, andmeans for pinning the same together and providing relative lateralmovement and means connectible to the pin for limiting said movement inone direction.

3. Aconlbined wheel-brake shoe and shoe head mutually interlocked, andmeans for pinning the same together and providing relative lateralmovement and a clip hung on the pin for limiting said movement in onedirection namely, away from the flange of a Wheel 011 which the brake isapplicable. 7

4. A combined, mutually interlocked brake shoe and head, and a pinpassed through the same on a longitudinal line of the parts and a clipengaging the pin to restrain-movement of the shoe in one direction.

.5. A combined, mutually interlocked brake shoe and head, and a pinpassed through the same on a longitudinal line of the parts and meansengaging the pin to restrain motion 01" the shoe in one direction, saidmeans including a clip with a hook adapted to straddle the pin andhaving an arm to reach around one side of the shoe.

6. A brake shoe and a head mutually interengaged therewith, the headhaving a pocket in its face toward the shoe, an apertured lug on theback of the shoe and enterin the pocket, a pin extending longitudina lyin the head and through the lug and a clip engaging the pin and having atongue bearing against the side surface of the shoe. In testimonywhereof I have hereunto set 111 hand.

y CHARLES I. WALKER.

